March 31, 1860

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Features

The Daguerreotype

Higging's Patent Anchor Tripper

The Obstruction to the Navigation of Rivers Caused by the Piers of Bridges

By J. W. Sprague

Loss of Light by Glass Shades

Glycerine for Gas Meters

A Sparkling Vane

How to Make a Mushroom Bed

Philosophical Instruments

A Wonderful Cave

Fawkes' Steam Plow

The Water Wheel Experiments at Philadelphia

Curious Optical Phenomena

A Chance for Inventors--a Greater than Whitney Wanted

A New Areometer for Determining the Real Density of Liquids

Polytechnic Association of the American Institute

Iron and Wooden Ships

English Locomotives on a Bender

American Naval Architecture

A Column of Varieties

Improved Hay--Maker

Improved Mole for Drain Plows

Wooden and Iron Ships

The Leather-Dealers and the Lynn Strikers

Working Steam Expansively

Activity and Industry of Inventors

Industry--Manufactures--Commerce

Peroration on a Wagon Brake

The Profits of Tanning

Self-Acting Ships' Pump

Testimonial Letters

Patent Claims - March 31, 1860

Issued from the United States Patent Office

Foreign News and Markets - March 31, 1860

Weekly Summary of Inventions - March 31, 1860

Applications for the Extension of Patents

Greene's Gas Lamp

Jorey's Patent Horse Shoe

Howe's Sewing Machine Trial

Lapham's Steam Trap

Departments

Departments

Notes and Queries - March 31, 1860

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